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I sometimes find that when Japanese answer my questions, their answers are too vague. For instance, I asked what つなぎ is in a given context. A Japanese person told me it is 作業着の種類, "a type of work clothes." That's still too vague for me. Is it a kind of cloth? What are the other types? What can I say to get more clarification to get a better explanation of what exactly つなぎ is?